hub and spoke... ip only... the interfaces ping because they are in the same subnet...
R1#sh run int s2/0
Building configuration...
Current configuration : 227 bytes
!
interface Serial2/0
ip address 10.1.1.1 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.1.3 103 broadcast
frame-relay map ip 10.1.1.2 102 broadcast
no frame-relay inverse-arp
R2#sh run int s2/0
Building configuration...
Current configuration : 217 bytes
!
interface Serial2/0
ip address 10.1.1.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.1.1 202 broadcast
frame-relay map ip 10.1.1.3 202
no frame-relay inverse-arp
R3#sh run int s2/0
Building configuration...
Current configuration : 217 bytes
!
interface Serial2/0
ip address 10.1.1.3 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.1.2 303
frame-relay map ip 10.1.1.1 303 broadcast
no frame-relay inverse-arp
R3#trace 10.1.1.2
Type escape sequence to abort.
Tracing the route to 10.1.1.2
VRF info: (vrf in name/id, vrf out name/id)
1 10.1.1.1 28 msec 36 msec 20 msec
2 10.1.1.2 32 msec * 48 msec
the ip ospf interface command gives you a lot of flexibility with the topology...
choose your weapons...
R1(config)#router ospf 1
R1(config-router)#netw 10.1.1.0 0.0.0.255 area 0
R1(config-router)#netw 1.1.1.0 0.0.0.255 area 0
R2(config)#router ospf 1
R2(config-router)#netw 10.1.1.0 0.0.0.255 area 0
R2(config-router)#netw 2.2.2.0 0.0.0.255 area 0
R2(config-router)#end
R3(config)#router ospf 1
R3(config-router)#netw 10.1.1.0 0.0.0.255 area 0
R3(config-router)#netw 3.3.3.0 0.0.0.255 area 0
note: you'll get no adjacencies until you declare the interface network types...
once ip ospf network point-to-multipoint is placed on the interfaces, you have a happy ospf situation...
R3#sh ip route | b Gate
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/65] via 10.1.1.1, 00:02:11, Serial2/0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/129] via 10.1.1.1, 00:02:11, Serial2/0
3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 3.3.3.0/24 is directly connected, Loopback0
L 3.3.3.3/32 is directly connected, Loopback0
10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C 10.1.1.0/24 is directly connected, Serial2/0
O 10.1.1.1/32 [110/64] via 10.1.1.1, 00:02:11, Serial2/0
O 10.1.1.2/32 [110/128] via 10.1.1.1, 00:02:11, Serial2/0
L 10.1.1.3/32 is directly connected, Serial2/0
R3#sh ip ospf int
Loopback0 is up, line protocol is up
Internet Address 3.3.3.3/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 3.3.3.3, Network Type LOOPBACK, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Loopback interface is treated as a stub Host
Serial2/0 is up, line protocol is up
Internet Address 10.1.1.3/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 3.3.3.3, Network Type POINT_TO_MULTIPOINT, Cost: 64
Topology-MTID Cost Disabled Shutdown Topology Name
0 64 no no Base
Transmit Delay is 1 sec, State POINT_TO_MULTIPOINT
Timer intervals configured, Hello 30, Dead 120, Wait 120, Retransmit 5
oob-resync timeout 120
Hello due in 00:00:03
Supports Link-local Signaling (LLS)
Cisco NSF helper support enabled
IETF NSF helper support enabled
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 1.1.1.1
Suppress hello for 0 neighbor(s)
the loopbacks show up as loopbacks... make them networks with ip ospf network point-to-point
R1#sh ip ospf int lo0
Loopback0 is up, line protocol is up
Internet Address 1.1.1.1/24, Area 0, Attached via Network Statement
Process ID 1, Router ID 1.1.1.1, Network Type POINT_TO_POINT, Cost: 1
Topology-MTID Cost Disabled Shutdown Topology Name
0 1 no no Base
Transmit Delay is 1 sec, State POINT_TO_POINT
the points network types have no dr/bdr (point-to-point and multipoint)
R1#sh ip ospf neigh
Neighbor ID Pri State Dead Time Address Interface
2.2.2.2 0 FULL/ - 00:01:58 10.1.1.2 Serial2/0
3.3.3.3 0 FULL/ - 00:01:47 10.1.1.3 Serial2/0
so there is no need to worry over ospf priority on the spokes...
R2#sh ip ospf neigh
Neighbor ID Pri State Dead Time Address Interface
1.1.1.1 0 FULL/ - 00:01:53 10.1.1.1 Serial2/0
now make an ipv6 tunnel between r2 and r3...
R3#sh run int tun0
Building configuration...
Current configuration : 118 bytes
!
interface Tunnel0
no ip address
ipv6 address 2001::3/64
tunnel source 10.1.1.3
tunnel destination 10.1.1.2
R3#ping 2001::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/32/40 ms
change the tunnel mode to ipv6ip...
note the encapsulation type...
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